I know this has been debated over and over again and the professional opinion for the most part is that, statistically speaking, it makes no difference if a batter has had great success against a certain pitcher or not. I played baseball my whole life all the way up to D1 and in my experience there is nothing more powerful than a hot streak or knowing you own a certain pitcher. There were days when I’d see a certain pitcher warming up before the game and I’d know I’d get a couple knocks just because I’ve gone 3-4 a couple times against this guy even if my teammates couldn’t solve him and there were other guys where my team would light up every time and I’d go 0-3 with 2 Ks. What I’m saying is maybe what analytics fails to record is the huge mental advantage you get while on a hot streak or from owning a pitcher over your career.
Feel free to let me know how horribly wrong I am.. I don’t use BvP exclusively but mostly as a last check i.e if I someone I’m about to pick is a career 1-15 against the starter I’ll find someone else